一个把String转成byte数组的小程序
来源：http://www.study-code.com/java/j2se/66420.htm
/*
*@类功能：将一个文件中的String声明转换成byte[] 声明
*
*
*@作者:关文柏
*@时间:2006年11月11日
*/
//---------------------------------------------------------------//
//NOTE: Make sure the identifier of variable as same as "inflag_0"
//
//---------------------------------------------------------------//
import java.io.*;
import java.util.*;
public class MakeResource
{
//Output file declare symbol
private static final String outflag_0 = " public final static byte[] ";
private static final String outflag_1 = " = {";
private static final String outflag_2 = "};";
private static final String outflag_3 = ",";
private static final int ch_0 = 0x0d;
private static final int ch_1 = 0x0a;
//Input file declare symbol
private static final String inflag_0 = "public final static String"; //' the squence may variety
private static final char inflag_1 = '"';
private static final char inflag_2 = ';';
private static final char inflag_3 = '=';
private static final char inflag_4 = '/';
//Resource of all string
private String[] res = null;
//Names of all string
private String[] resNames = null;
//For debug
private boolean debug = false;
public MakeResource()
{
System.out.println("Please enter the file name:");
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
try{
doInput(br.readLine());
}catch(Exception e){
e.printStackTrace();
}
doOutput(res,resNames);
}
public static void main(String[] args)
{
new MakeResource();
}
private void doInput(String fileName)
{
try{
FileInputStream fis = new FileInputStream( new File( fileName ) );
byte[] contents = new byte[ fis.available() ];
fis.read( contents );
if(debug)
System.out.println("The file has "+contents.length+" bytes");
char[] declare = inflag_0.toCharArray();
Vector names = new Vector(); //For save variable names
Vector resStr = new Vector(); //For save the variable's content
int x = 0; //index of all bytes
boolean out = false; //Flag for out of loop
int variableNum = 0;
while(!out)
{
int counter = 0; //Matching char numbers
int y = 0; //index of 'declare' array
if(contents[x]==inflag_4) //skip a comment line
{
boolean out_0 = false;
while( !out_0 && x+2 < contents.length)
{
if( ((int)contents[x+1]!= ch_0) && ((int)contents[x+2]!= ch_1) )
{
x++;
}else
{
out_0 = true;
}
}
}
if(contents[x] == declare[y])
{
for(y = 1; y < declare.length ; y++)
{
if(x + 1 < contents.length)
{
if(contents[++x]==declare[y])
counter++;
}
else
{
out = true;
}
}
}
//If some chars begin with "public final static String"
if(counter==declare.length-1)
{
variableNum++;
if(debug)
System.out.println("A variable matching at "+x);
if(x + 1 < contents.length)
x++; //skip a space in front of the variable name
else
{
out = true;
}
StringBuffer avName = new StringBuffer(); //For save the variable name
boolean out_1 = false;
while( !out_1 && x+1 < contents.length)
{
if(contents[++x]!=inflag_3)
{
avName.append((char)contents[x]);
}else
{
out_1 = true;
}
}
names.addElement( avName.toString() );
boolean out_2 = false;
StringBuffer str = new StringBuffer(); //For save the variable content
while(!out_2 && x + 1 < contents.length)
{
if(contents[++x]==inflag_1)
{
boolean out_3 = false;
while(!out_3 && x + 1 < contents.length)
{
if( contents[++x]!=inflag_2 )
{
str.append( (char)contents[x] );
}else
{
out_3 = true;
out_2 = true;
}
}
}
}
if(str.length() > 0)
str.deleteCharAt( str.length() -1 ); //Delete the last char of content,it is must a ' " '
resStr.addElement( str.toString() );
}
counter = 0; //reset counter
if(x + 1 < contents.length)
x++; //If does not matched any char, move index of all bytes
else
{
out = true;
}
}
res = new String[resStr.size()];
//if(debug)
//System.out.println("//--------------Variable contents--------------//");
for(int p = 0 ; p < resStr.size(); p++)
{
res[p] = (String)resStr.elementAt(p);
//if(debug)
//System.out.println( (String)resStr.elementAt(p) );
}
if(debug)
System.out.println("");
resNames = new String[names.size()];
if(debug)
System.out.println("//--------------Variable names--------------//");
for(int q = 0 ; q < names.size(); q++)
{
resNames[q] = (String)names.elementAt(q);
if(debug)
System.out.println( (String)names.elementAt(q) );
}
if(debug)
System.out.println(variableNum+" variables has been finded!");
}catch(Exception ex)
{
ex.printStackTrace();
}
}
private void doOutput(String[] res,String[] names)
{
int strLength = 0;
if((res==null)||(names==null))
{
System.out.println("Array does not initial");
return;
}
if( (strLength = res.length ) != names.length )
{
System.out.println("Current array not correct");
return;
}
try
{
FileWriter fw = new FileWriter( new File(".","result.txt") ); //A file named 'result' for save the content
for(int m =0 ; m < strLength; m++)
{
byte[] b = res[m].getBytes();
fw.write( outflag_0, 0, outflag_0.length() ); //write the identifier
fw.write( names[m], 0, names[m].length() ); //write variable name
fw.write( outflag_1, 0, outflag_1.length() ); //'={'
for(int z = 0 ; z < b.length; z++)
{
fw.write( new Integer((int)b[z]).toString() ); //write bytes with int format
if(z<b.length-1)
fw.write( outflag_3, 0, outflag_3.length() ); //','
}
fw.write( outflag_2, 0, outflag_2.length() ); //'};'
fw.write( ch_0 ); //write a enter for new line
fw.write( ch_1 );
}
fw.close();
System.out.println("Output successfully!!!!!");
}catch(Exception e)
{
e.printStackTrace();
}
}
}
